A study of passive films formed on pure ferritic steels

Berneron, R.; Charbonnier, Jean; Namdar-Irani, R.; Manenc, J.

doi:10.1016/0010-938x(80)90122-5

Cited by 26 publications

(6 citation statements)

References 6 publications

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“…The main features of anion interaction with passive film have been related to their adsorbability on the surface of micelles. Protection conferred by some elements such as Mo may be attributed to their accommodation in this structure by cation substitution (34). A consideration of colloidal iron oxides also strongly supports this description and may provide some kind of new approach to passivity studies.…”

Section: Resultsmentioning

confidence: 53%

Electrochemical Behavior of Passive Iron in Acid Medium: II . The Passive Film/Solution Interface

Keddam

Pallotta

1985

J. Electrochem. Soc.

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The passive film on iron in acid media is investigated by means of a rapid change of electrolyte composition, with special attention to anion content, and by redox kinetics studies with a rotating disk under steady state and nonsteady state (electrohydrodynamic impedance). These techniques, associated with classical electrochemical impedance, allow one to establish the existence at the film-electrolyte interface of a loosely structured film limiting the rate of mass transfer in the case of ferrocyanide oxidation. Dynamic exchange of anions and most of the electrolyte composition effects take place in this layer. An attempt is made to relate the behavior of the passive film on iron in acid media to basic properties of iron oxides and oxyhydroxides in their colloidal state.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.172.10.194 Downloaded on 2015-03-15 to IP Vol. 132,No. 4 PASSIVE IRON IN ACID MEDIUM 783 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.172.10.194 Downloaded on 2015-03-15 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.172.10.194 Downloaded on 2015-03-15 to IP Vol. 132,No. 4

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Section: Resultsmentioning

confidence: 53%

Electrochemical Behavior of Passive Iron in Acid Medium: II . The Passive Film/Solution Interface

Keddam

Pallotta

1985

J. Electrochem. Soc.

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“…Selon les théories actuelles sur la passivité et sur le rôle du molybdène, le film de passivité serait constitué de 2 couches (6)(7)(8)(9). La couche externe est composée de molybdates, alors que la couche interne, riche en molybdène métallique ou à l'état de valence peu élevé (10)(11)(12)(13)(14)(15) aurait une structure amorphe.…”

Section: Résultats Expérimentauxunclassified

Comportement électrochimique de l'acier inoxydable 316L dans le procédé de blanchiment par le chlorite de sodium

Tanane

Irhzo

Pébère³

et al. 1993

J. Chim. Phys.

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Ce travail consacré à l'étude du comportement électrochimique de l'acier inoxydable 316L dans le procédé de blanchiment du coton par le chlorite de sodium a permis de déduire les conclusions suivantes : -Au voisinage du potentiel de corrosion, les mesures électrochimiques stationnaires couplées aux mesures d'impédance électrochimiques ont permis de différencier les processus d'électrode. Un phénomène de transport associé au transfert de charge ont été caractérisés.-Un palier de diffusion est obtenu entre -200 et -600 mv/ECS pour la solution de chlorite de pH = 3,30 dont les valeurs iL, en fonction de la racine carrée de la vitesse de rotation de l'électrode, se placent sur une droite ne passant pas par l'origine. Ce décalage à l'origine pourrait être dû à l'intervention d'un adsorbat.-Les risques de corrosion par piqûre sont la conséquence de la présence d'ions Cl-dont la concentration est assujettie au pH de la solution. Le pouvoir oxydant élevé favorise l'adsorption des ions Cl-sur le film de passivité et induit sa rupture.-La présence, dans les spectres Auger, d'un pic de chlore confirme la sensibilisation à la rupture de la passivité par les ions chlorures.

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“…Passive film on SS has been analyzed using various technologies and methods, including TEM 1 , XPS 2 , AES 3 , SIMS 4 , GDS 5 , XAFS 6 , MU-VRS 7 , Raman spectroscopy 8–11 , ellipsometry 11–15 and potential-modulated reflection spectroscopy (PMRS) 11,15–18 . Passive film contains a chromium-rich inner oxide layer and an iron-chromium hydroxide outer layer with an amorphous stucture 18–25 .…”

Section: Introductionmentioning

confidence: 99%

“…Most of the above studies were performed in ultra-high vacuum 1–5,18–26 , but the characteristics of passive film change with environment. Therefore, the film should be studied in situ , that is, in the environment from which we want the film to protect the substrate.…”

Section: Introductionmentioning

confidence: 99%

Using Atomic Force Microscopy to Measure Thickness of Passive Film on Stainless Steel Immersed in Aqueous Solution

Wang

Xia

et al. 2019

Sci Rep

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Employing atomic force microscopy (AFM) to measure passive film thickness on stainless steel (SS) in aqueous solution is proposed. SUS304 austenite and SUS329J4L duplex SS samples partly covered by gold were set in a minicell. To remove the original film, the SS surface but gold was etched using dilute sulfuric acid. After cleaning, open circuit potential (OCP), and distance from the sample surface to the top of the gold were measured. They were then immersed in either 1.0% NaCl; 5.0% NaCl; or aqueous solution with pH ranging from 1.0 to 10.0 and measured again. Differences between the first and subsequent measures of OCP suggested a passive film had formed in solution with pH ranging from 2.8 to 10.0. Similarly, differences among AFM measures revealed the observed film thickness increased with increase in pH and with decrease in chloride ions. Also, film thickness in water was greater than that in a vacuum. Comparison of AFM measurements of passive film on the austenite and sigma phases in sensitized SUS329J4L duplex SS revealed the film was thinner on the sigma phase containing more chromium. Taken together, these findings suggest the proposed method is applicable for measuring the thickness of passive films in aqueous solution.

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A study of passive films formed on pure ferritic steels

Cited by 26 publications

References 6 publications

Electrochemical Behavior of Passive Iron in Acid Medium: II . The Passive Film/Solution Interface

Electrochemical Behavior of Passive Iron in Acid Medium: II . The Passive Film/Solution Interface

Comportement électrochimique de l'acier inoxydable 316L dans le procédé de blanchiment par le chlorite de sodium

Using Atomic Force Microscopy to Measure Thickness of Passive Film on Stainless Steel Immersed in Aqueous Solution

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